The gold coin, designed by Irish artist Mary Gregoriy, goes on sale today for €48 each. Only 10,000 will be issued.

The coin features elements typical of Irish medieval architecture, including a round tower, a Celtic cross and a gothic rose window.

"The combination of these elements, inspired by the Rock of Cashel, provides a clear example of the indigenous and European styles and influences prominent during Ireland's medieval period," said Central Bank governor Patrick Honohan.